An analysis of the characteristics and improved use of newly developed CT-based navigation system in total hip arthroplasty

Yosuke Fujii, Kazuo Fujiwara, Tomonori Tetsunaga, Takamasa Miyake, Kazuki Yamada, Hirosuke Endo, Nobuhiro Abe, Naohiko Sugita, Mamoru Mitsuishi, Takayuki Inoue, Yoshio Nakashima, Toshihumi Ozaki

Research output: Contribution to journalArticle

Abstract

We developed a surface matching-type computed tomography (CT)-based navigation system for total hip arthroplasty (the N-navi; TEIJIN NAKASHIMA MEDICAL, Okayama, Japan). In the registration step, surface matching was performed with digitizing points on the pelvic bone surface after coarse paired matching. In the present study, we made model bones from the CT data of patients whose acetabular shapes had various deformities. We measured the distances and angles after surface matching from the fiducial points and evaluated the ability to correct surface-matching registration on each pelvic form, using several areas and numbers of points. When the surface-matching points were taken on the superior area of the acetabulum, the correction was easy for the external direction, but it was difficult to correct for the anterior and proximal directions. The correction was difficult for external and proximal directions on the posterior area. Each area of surface-matching points has particular directions that are easily corrected and other directions that are difficult to correct. The shape of the pelvis also affected the correction ability. Our present findings suggest that checking the position after coarse paired matching and choosing the surface-matching area and points that are optimal to correct will improve the accuracy of total hip arthroplasty and reduce surgical times.

Original languageEnglish
Pages (from-to)279-289
Number of pages11
JournalActa Medica Okayama
Volume71
Issue number4
Publication statusPublished - 2017

Fingerprint

Arthroplasty
Navigation systems
Tomography
Hip
Pelvic Bones
Acetabulum
Operative Time
Bone
Pelvis
Japan
Direction compound
Bone and Bones

Keywords

  • CT-based navigation system
  • Surface matching
  • Total hip arthroplasty

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

An analysis of the characteristics and improved use of newly developed CT-based navigation system in total hip arthroplasty. / Fujii, Yosuke; Fujiwara, Kazuo; Tetsunaga, Tomonori; Miyake, Takamasa; Yamada, Kazuki; Endo, Hirosuke; Abe, Nobuhiro; Sugita, Naohiko; Mitsuishi, Mamoru; Inoue, Takayuki; Nakashima, Yoshio; Ozaki, Toshihumi.

In: Acta Medica Okayama, Vol. 71, No. 4, 2017, p. 279-289.

Research output: Contribution to journalArticle

Fujii, Y, Fujiwara, K, Tetsunaga, T, Miyake, T, Yamada, K, Endo, H, Abe, N, Sugita, N, Mitsuishi, M, Inoue, T, Nakashima, Y & Ozaki, T 2017, 'An analysis of the characteristics and improved use of newly developed CT-based navigation system in total hip arthroplasty', Acta Medica Okayama, vol. 71, no. 4, pp. 279-289.
Fujii, Yosuke ; Fujiwara, Kazuo ; Tetsunaga, Tomonori ; Miyake, Takamasa ; Yamada, Kazuki ; Endo, Hirosuke ; Abe, Nobuhiro ; Sugita, Naohiko ; Mitsuishi, Mamoru ; Inoue, Takayuki ; Nakashima, Yoshio ; Ozaki, Toshihumi. / An analysis of the characteristics and improved use of newly developed CT-based navigation system in total hip arthroplasty. In: Acta Medica Okayama. 2017 ; Vol. 71, No. 4. pp. 279-289.
@article{2456e3dc8ac6461b9181f2f51e2da0c5,
title = "An analysis of the characteristics and improved use of newly developed CT-based navigation system in total hip arthroplasty",
abstract = "We developed a surface matching-type computed tomography (CT)-based navigation system for total hip arthroplasty (the N-navi; TEIJIN NAKASHIMA MEDICAL, Okayama, Japan). In the registration step, surface matching was performed with digitizing points on the pelvic bone surface after coarse paired matching. In the present study, we made model bones from the CT data of patients whose acetabular shapes had various deformities. We measured the distances and angles after surface matching from the fiducial points and evaluated the ability to correct surface-matching registration on each pelvic form, using several areas and numbers of points. When the surface-matching points were taken on the superior area of the acetabulum, the correction was easy for the external direction, but it was difficult to correct for the anterior and proximal directions. The correction was difficult for external and proximal directions on the posterior area. Each area of surface-matching points has particular directions that are easily corrected and other directions that are difficult to correct. The shape of the pelvis also affected the correction ability. Our present findings suggest that checking the position after coarse paired matching and choosing the surface-matching area and points that are optimal to correct will improve the accuracy of total hip arthroplasty and reduce surgical times.",
keywords = "CT-based navigation system, Surface matching, Total hip arthroplasty",
author = "Yosuke Fujii and Kazuo Fujiwara and Tomonori Tetsunaga and Takamasa Miyake and Kazuki Yamada and Hirosuke Endo and Nobuhiro Abe and Naohiko Sugita and Mamoru Mitsuishi and Takayuki Inoue and Yoshio Nakashima and Toshihumi Ozaki",
year = "2017",
language = "English",
volume = "71",
pages = "279--289",
journal = "Acta Medica Okayama",
issn = "0386-300X",
publisher = "Okayama University",
number = "4",

}

TY - JOUR

T1 - An analysis of the characteristics and improved use of newly developed CT-based navigation system in total hip arthroplasty

AU - Fujii, Yosuke

AU - Fujiwara, Kazuo

AU - Tetsunaga, Tomonori

AU - Miyake, Takamasa

AU - Yamada, Kazuki

AU - Endo, Hirosuke

AU - Abe, Nobuhiro

AU - Sugita, Naohiko

AU - Mitsuishi, Mamoru

AU - Inoue, Takayuki

AU - Nakashima, Yoshio

AU - Ozaki, Toshihumi

PY - 2017

Y1 - 2017

N2 - We developed a surface matching-type computed tomography (CT)-based navigation system for total hip arthroplasty (the N-navi; TEIJIN NAKASHIMA MEDICAL, Okayama, Japan). In the registration step, surface matching was performed with digitizing points on the pelvic bone surface after coarse paired matching. In the present study, we made model bones from the CT data of patients whose acetabular shapes had various deformities. We measured the distances and angles after surface matching from the fiducial points and evaluated the ability to correct surface-matching registration on each pelvic form, using several areas and numbers of points. When the surface-matching points were taken on the superior area of the acetabulum, the correction was easy for the external direction, but it was difficult to correct for the anterior and proximal directions. The correction was difficult for external and proximal directions on the posterior area. Each area of surface-matching points has particular directions that are easily corrected and other directions that are difficult to correct. The shape of the pelvis also affected the correction ability. Our present findings suggest that checking the position after coarse paired matching and choosing the surface-matching area and points that are optimal to correct will improve the accuracy of total hip arthroplasty and reduce surgical times.

AB - We developed a surface matching-type computed tomography (CT)-based navigation system for total hip arthroplasty (the N-navi; TEIJIN NAKASHIMA MEDICAL, Okayama, Japan). In the registration step, surface matching was performed with digitizing points on the pelvic bone surface after coarse paired matching. In the present study, we made model bones from the CT data of patients whose acetabular shapes had various deformities. We measured the distances and angles after surface matching from the fiducial points and evaluated the ability to correct surface-matching registration on each pelvic form, using several areas and numbers of points. When the surface-matching points were taken on the superior area of the acetabulum, the correction was easy for the external direction, but it was difficult to correct for the anterior and proximal directions. The correction was difficult for external and proximal directions on the posterior area. Each area of surface-matching points has particular directions that are easily corrected and other directions that are difficult to correct. The shape of the pelvis also affected the correction ability. Our present findings suggest that checking the position after coarse paired matching and choosing the surface-matching area and points that are optimal to correct will improve the accuracy of total hip arthroplasty and reduce surgical times.

KW - CT-based navigation system

KW - Surface matching

KW - Total hip arthroplasty

UR - http://www.scopus.com/inward/record.url?scp=85027270573&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85027270573&partnerID=8YFLogxK

M3 - Article

VL - 71

SP - 279

EP - 289

JO - Acta Medica Okayama

JF - Acta Medica Okayama

SN - 0386-300X

IS - 4

ER -